THE AMPHIPODA. 27 



pairs, none being present on the second gnathopods. Vosseler does not definitely say 

 that this is the case with the form which he has examined, but implies it by speaking oF 

 " the four pairs of branchiae situated behind the third to the sixth leg," in evident 

 allusion to Chun's mode of expression, " four pairs of branchial sacs between the third 

 to the seventh pair of thoracic feet." In the specimen from the Bay of Biscay, which 

 specimen I dissected with a special view to this point, the second gnathopods are beyond 

 doubt provided with branchial sacs, and this specimen agrees in one respect better with 

 Dr. Vosseler's figure than with my own, for in the fourth perseopods I have represented 

 the sixth joint rather shorter than the fourth, but Vosseler, who describes it as bein«- as 

 long as the fourth, figures it as longer, which it really is in the instance most recently 

 examined. Chun assigns a spine -process to the third joint of the third per^opods, using 

 this as a mark to distinguish his aS'. Bovallii from the S. Claiisi of Bovallius. But no 

 such spine is found in S. Battrmji. Under all these circumstances it seems unsafe to 

 cancel the latter name in favour of S. leplsma, however the differences of description 

 might be conjecturally explained away. 



Length of specimen, first antennae included, 3'3 mm. 



Occurrence : 32 o. 75 to fathoms. 1 specimen. 



10. SciNA LEPiSMA (Chun), (Plate 3 b.) 



1889. Fortunata lepisma, ^ , Chun, Math. u. Naturw. Mittheihuigen Ak. Berlin, Bd. xlv. p. 533 (343), 



pi. 3. fig. 10. 

 1889. Scina Bovallii (and Bovalli), Chun, Zool. Anzeiger, Jahrg. xii. No. .309, p. 308. 



It was not till after I had completed, as I thought, my present review of this family 

 that an example of Chun's interesting species came to light in a bottle containing some 

 larger Hyperiids. The very close agreement with Chun's description in almost all 

 particulars of moment will be seen from the figures of details here given (PI. Soi). The 

 telson, however, is not rounded off, but narrowly triangular, and there are small branchial 

 vesicles to the second gnathopods as well as to the four following pairs of limbs. The 

 mouth-organs are very small, the upper lip very unsymmetrically bilobed, and the twin 

 plates of the maxillipeds are not drawn out into sharp apices. The outer margin of the 

 large joint in the fiagellum of the first antenna? shows seven or eight teeth. In the 

 first and second perseopods the fifth joint, which is longer than the fourth or sixth, is 

 conspicuously glandular. In the remarkable third pair the short tooth on the third joint 

 is minute as in various other species, but the shortness of the fourth joint, in comparison 

 with the slender curved hand, and the elongated finger are highly distinctive. In the 

 fourth pair the second joint is in our si)ecimen not quite so long as the fourth and fifth 

 combined, thereby slightly diflfcring from Chun's description. 



Length of the specimen, a nearly full-grown male, io mm. Chun's specimen 

 measured 5 mm. It was a male in the same condition as the present example « ith 

 regard to the overlapping second antennae, and was taken at a depth of 1600 m. between 

 Tenerife and Gran Canaria. 



Occurrence : 36 k. 300 to fathoms. 1 specimen. 



SECOND SERIES. — ZOOLOGY, VOL. X. 6 



