140 ZOOLOGICAL COLLECTIONS MADE BY H. M.S. 'alert.' [Jan. 4, 



4. A portion of (he ambulacral area of the same, rather more highly 



magnified, p. 89. 



5. CallidernuL grai/i, abactiual surface, natural size, p. 95. 



t). Ophioscolex coppinffen,\side yiew of part of an arm, to show the spines, 

 mastnifletl four times, p. 98. 



Plate IX. 



(ECIIINODERMATA.) 



Fig. 1. Asterias limndti, sp. uov., X 2 diani., p. 91. 



2. alha, sp. nov., X 2 diam., p. 92. 



o. obtusispinosfi, sp. nov., X 2 diam., p. 92. 



4. neglecta, sp. nov., X 2 diam., p. 94. 



5. Cycethra simplex, sp. nov., nat. size, p. 96. 



6. , aclinal surface of ray, X H diam. 



Plate X. 



(Spongida.) 



Fig. 1. Aplysina? regular is, p. 108. 



a. Fibre of external portion of section taken perpendicular to 

 surface, X 34 diam. ; h. Portion of skeleton, X 375 diam. 

 U. Ghalina ooppijigcri, p. 110. 

 Spicules, X 375 diam. 



3. S'phonuchalina forft!', p. 111. 



a. Fibre from section perpendicular to surface, X 34 diam. ; b. 

 Spicules, X 375 diara. 



4. Cladochalinn annigera, yow pergamcntacea, p. 112. 



a. Fibre from section perpendicular to surface, X 34 diam.; b. 

 Spicule, X 375 diam. 



5. Esperia magcllanica, p. 117. Specimen from Sandy Point. 



a. Entire Sponge, reduced to one third nat. size ; b. Main-skeleton 

 spicule, X 134 diam., and head, further enlarged, to show character 

 of central canal ; c. Dermal-skeleton spicule, x 134 diam. ; d. In- 

 equianchorate flesh-spicule, from front and side, X 375 diam. ; 

 e. Bundle of fine acerate spicules, X 375. 



6. Fhakcllia egregia, p. 114. 



The various forms of spicules, X 67 diam. 



7. Ciocalypta calva, p. 115. 



(/. Part of fibre near its base, showing the imperfectly Holorrha- 

 phidote character of the fibre, X 67 diam. ; h. Skeleton- spicule, 

 X 134 diam., and head, further enlarged, to show character of 

 central canal. 



8. Alebimi proximuhi, p. 119. 



a. Skeleton-spicules ; b. Inequianehorate flesh-spicule, from front 

 and side; c. Bipocillate flesh-spicule : all X 375 diam. 



9. Hymedesmia poUta, p. 121. 



a. Smooth acuate spicules, X 134 diam., and head, further en- 

 larged ; b. Spined spicules, X 134 diam. ; c. Inequianehorate flesh- 

 spicule, from front and side, X 375 diara, 

 10. Trachytedmua spinata, p. 122. 



a. Skeleton as seen in a perjjendicular section of the entire thick- 

 ness of the sponge, x 34 diam. ; b. View of surface, showing dermal 

 skeleton and its connesioa with the main skeleton, X 34 diam. ; 

 c. Spined, and d, smooth acuate spicules, X 34 diam.; c. Cylindrical 

 spicule, X 134 diam., and head, further enlarged: /. Fine acuate, 

 X 134 diara. 



Plate XI. 

 (Spongida.) 

 Fig. 1. Tedania tenuicapitata, p. 124. 



a and c. Acuate and acerate spicules, X 134 diam. ; b. Cylindrical 

 spicule, X 134 diam., and extremities, further enlarged. 



