192 THE SCHIZOPODA. 
Length of the male 12 mm., of a female with marsupium 13 mm. 
Remarks.— This small species is allied to B. microps G. O. Sars, but differs 
especially in having the process at the end of the eye-stalks very much larger | 
and the longer lateral spines on the telson much shorter than in the last-named 
species. The integuments are thin; not a single specimen-:is really- well pre- 
served, and the majority a good deal mutilated and somewhat shrivelled; most 
of them are besides immature or small. 
It may be mentioned that a small, oblong ganglion is found at the base 
of the process on the eye-stalks; this ganglion is connected with the large optic 
ganglion by a couple of nerve fibres, and from it a fibre runs towards the end 
of the process, which probably may have some sensory function. 
SIRIELLA Dana (1850). 
Of this very large genus four species are at hand, three of which were taken 
in 1904-1905, and a fourth in 1900. 
10. Siriella thompsonii (H. Minne Epwarps). 
1837. Cynthia thompsonii H. Mitnr Epwarps, Hist. Nat. Crust., 2, p. 462. 
1852. ?Siriella vitrea Dana, U.S. Expl. Exp. Crust., 1, p. 656, pl. 43, figs. 6a—6m. 
?Siriella brevipes Dana, U.S. Expl. Exp. Crust., 1, p. 658, pl. 44, figs. la-lq. 
1861. Cynthia inermis Kréyer, Nat. Tidsskr., 3, R. 1, p. 44, tab. 2, fig. 6, a-g. 
1868. Siriella edwardsii Cuaus, Zeitschr. wiss. Zool., 17, p. 271, taf. 18. 
1882. Siriellides indica CzpRNtAvsky, Mon. Mysid., 1, p. 103, tab. 31, figs. 1-6. 
1885. Siriella thompsoni G. O. Sars, Challenger Rept., 13, p. 205, pl. 36, figs. 1-24. 
1910. Siriella thompsonii H. J. HANSEN, Siboga-Exp., 37, p. 31 (with further notes on synonymy). 
Sta. 4571. Oct. 7, 1904. Lat. 33° 40’ N., long. 119° 35’ W. 4 fms., surface net. 2 specimens. 
Sta. 4576. Oct. 8, 1904. Lat. 29° 52’ N., long. 116° 56’ W. Surface. 1 specimen. 
Sta. 4611. Oct. 18, 1904. Lat. 10° 33’ N., long. 88° 30’ W. Surface. More than 30 specimens. 
Sta. 4615. Oct. 19,1904. Lat. 9° 7’ N., long. 85° 11‘ W. Surface. 2 specimens. 
Sta. 4617. Oct. 20,1904. Lat. 7° 45’ N., long. 82° 25’ W. Surface. 1 specimen. 
Sta. 4619. Oct. 20, 1904. Lat. 7° 15’ N., long. 82° 8’ W. Surface. 2 specimens. 
Sta. 4635. Nov. 4, 1904. Lat. 3° 52.5’ N., long. 84° 14.3’ W. Surface. 3 specimens. 
Sta. 4640. Noy. 6, 1904. Lat. 0° 39.4’S., long. 88°11’ W. Surface. 1 specimen. 
Sta. 4646. Nov. 8, 1904. Lat. 4° 1.6’S., long. 89° 16.3’ W. Surface. 1 specimen. 
Sta. 4648. Nov. 9, 1904. Lat. 4° 43’S., long. 87° 7.5'W. Surface. 1 specimen. 
Sta. 4667. Nov. 18, 1904. Lat. 11° 59.5’ S., long. 83° 40.4’ W. Surface. 1 specimen. 
Sta. 4671. Nov. 20,1904. Lat. 12° 6.9’S., long. 78° 28.2’ W. Surface. 3 specimens. 
Sta. 4677. Dec. 5, 1904. Lat. 14° 37.5’S., long. 81° 41’ W. Surface. 1 specimen. 
Sta. 4678. Dec. 6, 1904. Lat. 16° 31.2’S., long. 85° 3.8’ W. Surface. 1 specimen. 
Sta. 4680. Dee. 7, 1904. Lat. 17° 55’S., long. 87° 42’ W. Surface. 13 specimens. 
Sta. 4682. Dec. 8, 1904. Lat. 19° 7.6’S., long. 90° 10.6’ W. Surface. 2 specimens. 
Sta. 4683. Dec. 9,1904. Lat. 20° 2.4’S., long. 91° 52.5’ W. 300 fms. to surface. 1 specimen. 
Sta. 4685. Dec. 10,1904. Lat. 21° 36.2’S., long. 94° 56’ W. 300 fms. to surface. 2 specimens. 
Sta. 4686. Dee. 10,1904. Lat, 22° 2.2’S., long. 95° 52’ W. Surface. 2 specimens. 
Sta. 4688. Dec. 11,1904. Lat. 23° 17.2’S., long. 98° 37.5’ W. Surface. 3 specimens. 
Sta. 4692. Dee. 13, 1904. Lat. 25° 40.4’ S., long. 104° 1.3’ W. Surface. 1 specimen. 
Sta. 4694. Dec. 22, 1904. Lat. 26° 34’ S., long. 108° 57.3’ W. Surface. 4 specimens. 
