BY WILLIASI A. HASWELL, M.A., B.SC. 999 



In contradistinction to this the fifth segment is very long and 

 slender. The rudimentary feet of the branchial segment almost 

 equal the branchiae in length. The spines of the dorsal surface of 

 the head and body are more strongly pronounced than in the other 

 Protelke. Moreover, the basal segment of tlie anterior antenna? 

 bears in its middle a small tubercle with one hair and the pro- 

 podos of the posterior gnathopoda is also tuberculated on the 

 dorsal side. The form of the abdomen I have not completely ascer- 

 tained, but it does not seem to present any special peculiarities." 

 I have only found this species in Port Jackson. 



HiRCELLA CORNIGERA. 



Caprella cornigera^ Haswell. 



(?) Proto cornigera, Mayer, I.e., p. 25 fig. 3. 



The following are Mayer's remarks on this species of which I 

 forwarded him specimens for his Monograph : — 



" The ten original specimens before me agree completely with 

 Haswell's description, but they probably belong to the genus Proto 

 as I was inclined to conclude on my first glance at the figure. This 

 shows, to wit, three pairs of branchife arranged in the manner 

 characteristic of Proto. * * * The three anterior pairs of 

 pereiopoda were not figured by Haswell, and are also no longer 

 present in my specimens. * * * The muscles going to these 

 limbs which in true Frotos are by no means weak are so feebly 

 developed that they have quite produced upon me the impression 

 that the limbs have become rudimentary ; one would then have to 

 do with a form in which the reduction of the thoracic legs had 

 gone even further than in the JSTew Zealand genus Caprellina. 

 Should this suspicion be borne out by the examination of fresh 

 specimens the creation of a new generic name for {%) Proto cornigera 

 would be unavoidable ; I should like in that case to have proposed 

 the name Hircella." 



Caprella iEQuiLiBRA. 



Caprella cBquilihra. Say. Journ. Acad. Philad. I. ; Bate and 

 Westwood, Vol. II., p. 71 ; Bate, p. 362, pi. LVII., fig. 5 ; Mayer, 

 p. 45, pi. I., fig. 7 ; pi. II., figs. 1-11 ; pi. IV., figs. 20-25 ; pi. V., 

 figs. 16-18 ; Miers, Collections of H.M.S. Alert, Crustacea, p. 320. 



